=
10÷16=
0.9﹣=
7.8﹣=
12.4+8.6=
3.6÷0.9=
4a+1.2a=
4×0.25÷0.25×4=
+=
1-=
-=
2-=
0.5+=
12÷18=
1.45+6.7=
8×0.125=
23=
-=
+=
1-=
+=
+2=